<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>loadding</title>
  <style>
    .spinner{
        margin: 100px auto;
        width: 50px;
        height: 50px;
        text-align: center;
        font-size: 10px;
    }
    
    .spinner > div{
      display: inline-block;
      background-color: rgb(43, 128, 226);
      height: 100%;
      width: 5px;
      margin-right:1px;
      animation: bytedance 1s infinite;
    }
    
    .spinner >div:nth-child(2) {
      background-color: rgb(49, 84, 124);
      animation-delay: -0.9s;
    }
    .spinner >div:nth-child(3) {
      background-color: rgb(88, 128, 173);
      animation-delay: -0.8s;
    }
    .spinner >div:nth-child(4) {
      background-color: rgb(88, 128, 173);
      animation-delay: -0.7s;
    }
    .spinner >div:nth-child(5) {
      background-color: rgb(142, 187, 240);
      animation-delay: -0.6s;
    } 
    
    @keyframes bytedance{
      0%, 40%, 100%{
        transform: scaleY(0.4);
      }
      20%{
        transform: scaleY(1);
      }
    }
  </style>
</head>
<body>
  <div class="spinner">
    <div></div>
    <div></div>
    <div></div>
    <div></div>
    <div></div>
  </div>
</body>
</html>
